Provided is a method of preparing 4,4′-dinitrodiphenylamine (4,4′-DNDPA) in high yield by reacting 4-nitroaniline with excess nitrobenzene via the NASH reaction, and a method of preparing 4,4′-bis(alkylamino)diphenylamine (4,4′BAADA) in high yield and purity by hydrogenating the resulting 4,4′-DNDPA with a ketone compound in the presence of hydrogen and hydrogenation catalyst. The disclosed process is simple, allows selective preparation of 4,4′-DNDPA without byproducts, and thus allows preparation of 4,4′-BAADA in high yield without a complicated purification procedure.
提供了一种通过NASH反应,将
4-硝基苯胺与过量的
硝基苯反应,高产率制备4,4′-二硝基
二苯胺(4,4′-D
NDPA)的方法,以及一种通过在
氢气和加氢催化剂存在下,用酮化合物对所得的4,4′-D
NDPA进行氢化制备高产率和高纯度的4,4′-双(烷基
氨基)
二苯胺(4,4′B
AADA)的方法。所披露的工艺简单,允许选择性制备4,4′-D
NDPA而无副产物,从而无需复杂的纯化程序即可高产率制备4,4′-B
AADA。